Dump grate



April 15, 1930.

5. J. A. WIEBE DUMP GRATE Filed Dec. 2, 1924 2 Sheets-=Sheec l ATTORNEYI Apfil 15,1930. I I V s. J. A. WIEBE 1,754,247

DUMP GRATE Filed Dec. 2, 1924 2 Sheets-Sheet 2 3 liimn INVENTOR ATTORNEYS Patented Apr. 15, 1930 SIGURD J'. A. WIEBE, OF EAST ORANGE, NEE/V JERSEY, AFQSEG-NOR TO INTERNATIONAL COMBUSTION ENGINEERING CORPORATION OF NEW YORK, N. Y., A CORPORATION OF DELAWARE DUMP GRATE Application filed December 2, 1924. Serial No. 753,451.

My invention relates to furnaces, and has special reference to power operated dump grates for furnaces.

Dump grates of this character in general commercial use are operated by means of a steam or other fluid operated piston which is connected with the rock shaft upon which the dumping member or grate bars are mounted, by means of an arm or lever secured on one end of the rock shaft, and a link connecting the free end of said lever with the piston rod, the dumping grate bars being held in raised position when pressure in the piston cylinder is relieved by means of a latching device which is moved into engagement with the upper or free end of said lever. Heretofore the actuating lever has been secured on the rock shaft by means of a key or spline which is received in ways in the shaft and hub of the lever. On account of the great weight of the parts and the heated material supported on the grate bars, it has been found that the bars soon become worn and will sag more and more as the grate is being used. 'With the actuating lever for the grate bars keyed directly on the rock shaft, as above described, the only way to remedy such sagging of the bars is to turn the rock shaft around and cut a new key-way at a different angle in order to bring the grate bars to the right position. Even on new installations, because of the irregularity and roughness of the grate bars, it is often found necessary to malre such adjustment. This is an expensive operation and causes long delays, which of course is objectionable.

An object of the present invention is to provide a power-operated dump grate of the character indicated in which there is provision of means whereby the required angular adjustment of the dumping grate bars may be accomplished easily and quickly and without in any way interfering with the normal operation of the furnace.

Another object of the invention is to provide a novel and improved power-operated dump grate.

The several features of the invention, whereby the above mentioned and other objects may be attained, will be clearly under stood from the following description and accompanying drawings, in which:

Figure l is a plan view of a power-operated dump grate mechanism embodying the features of the invention in their preferred form;

Fig. 2 is a side elevation of the same;

Fig. 3 is a detail side elevation on an enlarged scale of component parts of my improved mechanism; and

Fig. 4: is a detail sectional view taken on the line 4-4: of Fig. 3.

The power-operated dump grate illustrated in the drawings is provided with a dumping member 2 which may be made up of the usual grate bars that are arranged side by side and suitably secured on the squared portion of a rock shaft 4. The outer end of this rock shaft 4 extends through a suitable bearing in a supporting frame 6 which may be mounted on the outside of the side wall 7 of a furnace. An actuating arm or lever 8 is secured on the outer end of the rock shaft and its upper or free end is connected by a link 10 with the outer end of a piston rod 12 having a head 14 secured on its inner end which is arranged in the usual steam cylinder 16. Steam is adapted to be admitted into the steam cylinder at opposite sides of the piston, through a suitable valve 18, so as to move the piston in opposite directions and thus through the link 10 and actuating lever 8 raise and lower the dumping member. When the dumping mom ber has been moved into its raised position, as shown in Fig. 2 of the drawings, it is held in this position when thepressure in the cylinder is relieved by means of a latch lever 20, pivoted at 22 on the supporting frame 6, which is swung down by gravity, as the end of the actuating lever 8 passes thereunder, to position a shoulder 24; on the end thereof into abutting engagement with a shoulder 26 on the upper end of said actuating lever.

Heretofore, it has been customary to secure the actuating lever 8 directly upon the rock shaft 4 by means of a key or spline which is received in suitable ways in the shaft and hub of the lever. In the present construction, however, the actuated lever 8 is secured on the shaft in such a manner as to permit the angular position of the dumping member and rock shaft to be varied with relation to the actuating arm as desired, and this may be accomplished easily and quickly and without interfering in any way with the normal operation of the furnace. To provide for this, the actuating lever 8 instead of being secured directly upon the end of the rock shaft is loosely mounted thereon, and a second arm or lever 28 is secured on the rock shaft adjacent the outer side of the actuating lever 8. This lever 28 is secured on the shaft by means of a key 30 which is received in ways in the shaft and hub of the lever and may if desired be still further secured by means of a set screw 32. The upper portion of the lever 28 is provided with an inwardly projecting lug 34 which is received in a recess 36 in the outer side of the actuating lever 8. The opposite sides of the lug 34 are engaged by two adjustable abutment or set screws 38 which are screw-threaded through apertures in the ac tuating lever 8. With this construction it will be apparent that the actuating lever 8 is rigidly secured to the rock shaft 4:, and that by suitable adjustment of the abutment or set screws 88 the angular position of the dump ing member with relation to the actuating lever and other parts of the dumping mechanism may be varied as desired.

As will be evident to those skilled in the art, my invention permits various modifications without departing from the spirit thereof or the scope of the appended claims.

' What I claim is:

1. A dumping device of the class described having, in combination, a dumping member,

a rock shaft on which said dumping member is mounted, and means for actuating the rockshaft to raise and lower the dumping member comprising an arm mounted on the rock shaft so as to permit pivotal movement of the arm and shaft with relation to each other, and means for securing the arm to the rock shaft comprising a second arm secured on the shaft, and connections between said arms having provision for adjustment to vary the angular position of the rock shaft with relation to the first mentioned arm.

2. A dumping device of the class described having, in combination, a dumping member, a rock shaft on which said dumping member is mounted, and means for actuating the rock shaft to raise and lower the dumping member comprising an arm loosely mounted on the rock shaft, and means for securing the arm to the shaft comprising a second arm secured on the shaft, and connections between said arms comprising two opposed set screws carried by one of said arms engaging opposite sides of a projection on the other arm, said screws being adjustable to permit the dumping member and rock shaft to be adjusted angularly with relation to the first mentioned arm.

3. A dumping device of the class described having, in combination, a dumping member, a rock shaft on which said dumping member is mounted, and means for actuating the rock shaft to raise and lower the dumping member comprising an arm mounted on the rock shaft so as to permit pivotal movement ofthe' arm and shaft with relation to each other, and means for securing the arm to the rock shaft comprising a second arm secured on the shaft, and connections between said arms having provision for adjustment to vary the angular position of the rock shaft with relation to the firstmentioned arm, said connections holding said rockshaft from turning movement in both directions with relation to said firstmentioned arm irrespectiveof the degree of angular adjustment of'the rock shaft.

' SIGURD J. A. VVIEBE. 

